Orthodontic screw



FIG. 1 is a perspective view of an orthodontic screw showing our new design;

FIG. 2 is front elevation thereof;

FIG. 3 is a rear elevation thereof;

FIG. 4 is a left side elevation thereof;

FIG. 5 is a right side elevation thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line shown in the drawings are included for the purpose of illustrating environmental structure and form no part of the claimed design. 

The ornamental design for an orthodontic screw, as shown and described. 